First, a description of the problem:
flutter doctor Doctor summary (to see all details, run flutter doctor -v): [√] Flutter (Channel stable, v1.5.4-hotfix.2, on Microsoft Windows [Version 10.0.17134.765], locale zh-CN) [!] Android toolchain - develop for Android devices (Android SDK version 28.0.3) X Android license status unknown. Try re-installing or updating your Android SDK Manager. See https://developer.android.com/studio/#downloads or visit https://flutter.dev/setup/#android-setup for detailed instructions. [√] Android Studio (version 3.2) [√] VS Code (version 1.34.0) [!] Connected device ! No devices available ! Doctor found issues in 2 categories.
Solution:
1、 Android SDK version 28
Android Studio -> SDK Manager -> SDK Platforms tab -> select and install Android 9.0 Pie
2、Android BuildTools version 28.0.3
Android Studio -> SDK Manager -> SDK Tools tab -> select the lower right corner Show Package Details -> choose 28.0.3 in the Android SDK Build-Tools in and download
Then restart Android studio, then you can enter the command in cmd in
Reference link: https: //juejin.im/post/5d8c7be5f265da5b8305db5b